University of Khartoum

Corelation Between Destructive And Non Destructive Testing Of Concrete

Corelation Between Destructive And Non Destructive Testing Of Concrete

Show full item record

Title: Corelation Between Destructive And Non Destructive Testing Of Concrete
Author: Nasir, Huda Alssadig Shatir
Abstract: This research is an experimental study aimed to develop an empirical-mathematical relationship between the compressive strength of concrete and the results of some simple Non-destructive tests The experimental laboratory program of this research contains concrete mix design, casting, curing and testing of 120 concrete cubes using natural and crushed aggregate. Five different grades of concrete were selected in this experimental program, they are 15, 20, 25, 30, 35 N/mm2 and cured by completely soaking in water for 7 to 90-days. After complete water curing the cubes were crushed at the ages of 7, 14, 28, 90 days for each grade and before the execution of compressive strength test, the cubes were tested, using Schmidt Hammer and Ultrasonic Pulse Velocity (for the determination of the rebound number and velocities of the longitudinal ultrasonic waves). The velocity of the propagation of ultrasound pulses and the rebound values were measured for each cube under a load of 160 KN before attending the complete crushing. Additional data accumulated from field tests on real structures were collected from Building Materials laboratory of Building and Road Research Institute. All the data (laboratory tests and field tests) were analyzed statistically using the SPSS package (Statistical Package for Social Sciences) (see appendix A, Table: (A.1) for the field analyzed data) and the correlation curves were drawn. These curves which reached as a result of this research enable the engineer to estimate the value of concrete compressive strength depending on the value of NDT (Schmidt Hammer and Ultrasonic Pulse Velocity). The use of the combined methods (Schmidt Hammer and Ultrasonic Pulse Velocity) produces results that lie close to the true values when compared with each individual method. The results presented in this research confirm that a suitable combination of Non Destructive tests provides an effective solution from both the economical and technical point of view for prediction of compressive strength of concrete in real structures from simple Non-destructive tests.
Description: 211 Pages
URI: http://khartoumspace.uofk.edu/handle/123456789/20134
Date: 2016-03-28


Files in this item

Files Size Format View

This item appears in the following Collection(s)

Show full item record

Share

Search DSpace


Browse

My Account